task stringlengths 0 154k | __index_level_0__ int64 0 39.2k |
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Knight Search
Description:
Alice is a chess knight living in Chessland (an $N \times N$ board). The cells in
Chessland are numbered from $1$ to $N^2$ in row major order. Each cell
has an UPPERCASE alphabet character assigned to it. The
Chessland is described by a string $S$ of length $N^2$ (in row major or... | 28,500 |
Knight of the Tarot Cards
Description:
Consider an infinite chessboard and a special knight whose
move types can change given power-ups. The knight is trying to
reach square $(0, 0)$.
Some of the squares of the infinite chessboard have tarot
cards on them. If the knight lands on some position
$(r, c)$... | 28,501 |
Knight's Marathon
Description:
After an exhausting battle, the invading army is finally
defeated. The king sends his only surviving knight to the
kingdom’s capital to tell the people of your victory. This
might be a very (very!) long journey.
The knight moves as on a chessboard: in each move, he
trave... | 28,502 |
Knight's Trip
Description:
In chess, each move of a knight consists of moving by two
squares horizontally and one square vertically, or by one
square horizontally and two squares vertically. A knight making
one move from location $(0,0)$ of an infinite chess board
would end up at one of the following e... | 28,503 |
Knightly Knowledge
Description:
Ancient cultures had an enormous and mostly unexpected
knowledge of the earth and geometry. When they were building
monuments, they did not place them at arbitrary locations.
Instead, each building spot was carefully selected and
calculated. Nowadays we can observe this ... | 28,504 |
Knights
Description:
Magnus is the youngest chess grandmaster ever. He loves
chess so much that he decided to decorate his home with chess
pieces. To decorate his long corridor, he decided to use the
knight pieces. His corridor is covered by beautiful square
marble tiles of alternating colors, just lik... | 28,505 |
Knights in Fen
Description:
There are black and white knights on a 5 by 5 chessboard.
There are twelve of each color, and there is one square that is
empty. At any time, a knight can move into an empty square as
long as it moves like a knight in normal chess (what else did
you expect?).
Given an initi... | 28,506 |
Knigs of the Forest
Description:
All moose are knigs of the forest, but your latest
moose-friend, Karl-Älgtav, is more interesting than most. In
part because of his fondness of fermented blueberries, and in
part because of the tribe he lives in. Each year his tribe
holds a tournament to determine that ... | 28,507 |
Knitpicking
Description:
To find matching socks, she simply randomly takes single
socks out of the drawer until she has a matching pair. It may
take a long time, for example when she keeps drawing right
socks without a matching left one. How long does she need to
keep drawing socks until she is guarant... | 28,508 |
Knitting Pattern
Description:
Jörmunrekur had found himself with some extra time on his
hands, so he decided to try to find a new hobby. After
discussing this with some of his relatives, his grandparents
lent him a book with knitting guides and knitting patterns.
He wants to start with something big, so h... | 28,509 |
Knockout Tournament
Description:
Laura is organising a knockout tournament, in which her
friend Dale takes part. Laura would like to maximise the
probability of Dale winning the tournament by arranging the
games in a favourable way. She does not know how to do it, so
she asked you for help. Naturally, ... | 28,510 |
Knot Knowledge
Description:
Sonja the scout is taking a test to see if she knows all the
knots a scout is supposed to know. The Scout’s Big Book of
Knots has descriptions of $1\,
000$ different knots, conveniently numbered from
$1$ to $1\, 000$. For the test, Sonja needs
to learn a specific set of ... | 28,511 |
Knox
Description:
Ellen has just bought herself a new fort to protect all her
precious belongings. Her fort is of course very well protected,
and in fact the only possible point of entry is the main
hallway. Ellen’s hallway is a big room with a long and narrow
path through the center (aligned with the ... | 28,512 |
Kodama Hierarchy
Description:
You are currently trying to recruit a squad of kodama in
order to take over the world.
You can pick some subset of $N$ kodamas as your group. The
$i$-th kodama has a level
of charisma $c_i$ and a
level of aura $a_i$. Both
$c_i$ and $a_i$ are nonnegative.
Kodamas oper... | 28,513 |
Koffínhraði
Description:
Oh no! Now towards the end of the term there are all kinds
of exams and final projects closing in! By your side you of
course have your trusty stash of caffeinated drinks. Tea,
coffee, energy drinks and more can help you cover all the
material and finish all the projects in the... | 28,514 |
Kolinje
Description:
Melita has just returned from the annual pig slaughter.
Don’t worry, this is a regular thing in Croatia. The best part
was the abundance of food! There was everything, starting from
good spicy sausages, ham, black pudding, up to teewurst, top
quality bacon and čvarci, all with warm... | 28,515 |
Kolkrabbaleikarnir
Description:
The Oktopus Games 2022 have begun. Arnar, also known as
Oktopus, invited a number of contestants to participate in this
exciting contest, in which the prize is a large sum of cash.
The contest includes multiple different games. At the start of
the contest, the number of ... | 28,516 |
Kolone
Description:
When moving, ants form rows so that each ant except the
first is behind another ant. It is not widely known what
happens when two rows of ants moving in opposite directions run
into each other in a passage too narrow for both rows to pass
through. One theory says that, in that situa... | 28,517 |
Kornislav
Description:
Kornislav the turtle never has anything interesting to do.
Since he’s going to live for three hundred years, he keeps
trying to find way to kill time. This weekend he started
playing "enclose the largest rectangle".
To start with, Kornislav needs four positive integers. He
tries... | 28,518 |
Kralj
Description:
Young ruler Mirko has declared himself king of dwarves. Upon
hearing this, Slavko felt threatened and soon declared himself
king of elves! As there cannot be more than one king in the
land, they have decided to resolve the issue of power once and
for all.
Slavko will, along with the... | 28,519 |
Kraljevi
Description:
Mirko and Slavko are playing a chess like game. The game is
played on a non-standard chess board sized $R$ rows by $C$ columns. Each player starts with
some number of chess kings. In chess kings can move from their
current field to any of the $8$ neighbouring fields. Player spread is ... | 28,520 |
Kratki
Description:
All of you are probably very familiar with the problem of
finding the longest monotone subsequence. You probably think
you know all about it. In order to convince us, solve the
problem “opposite” to finding the longest monotone
subsequence.
For given $N$ and
$K$, find a sequenc... | 28,521 |
Križaljka
Description:
Since ACTA has entered into force, Slavko has been spending
his time offline, solving crosswords. Having solved almost all
that he could get his hands on, he wants to make a few
crosswords of his own. However, he is too sloppy for such fine
work, so he has asked you to help him g... | 28,522 |
Krtica
Description:
Moles are tidy and hard-working animals. Our mole likes to
keep its underground residence in utmost order, so that
everyone living there knows where to find things.
To achieve this, the mole connected rooms with tunnels so
that there is a single unique way to get from one room to any
... | 28,523 |
Kruidnoten
Description:
Every week, Karlijn and her teammates join the competitive
programming training at their university. Thinking and coding
for such a long time is quite exhausting, and they need a ton
of snacks to get through training. They have divided the chore
of bringing snacks neatly: while ... | 28,524 |
Krumpirko
Description:
Young Mr. Potato is opening two new stores where he will,
you guessed it, sell potatoes. Mr. Potato gets his potatoes
from $N$ farmers. Each
farmer offers exactly $a_
i$ potatoes per bag for a total price of $c_ i$. Mr. Potato is going to buy all
bags of potatoes from all far... | 28,525 |
Kth Subtree
Description:
You are given an unrooted labeled tree. A subtree is a
connected subgraph of this tree. The size of a subtree is the
number of nodes in the subtree. Two subtrees are different if
there is at least one node which is in one but not the other.
The largest subtree is the original t... | 28,526 |
Kubb
Description:
Apart from Liar’s dice, another game that Simon
likes is the traditional Swedish game of Kubb, also known as
“Viking chess”. The exact rules of Kubb are complex, and vary
from household to household. However, one aspect always remains
the same, which is that of hitting the opposing te... | 28,527 |
Kuggfrågan
Description:
Tyko is about to start kindergarten so Maj and Måns have
started looking for options. During a visit to one of the
kindergartens Tyko noticed a poster on the wall. It was one of
those usual PR posters on how well the the teachers, kids and
parents worked together. However, on th... | 28,528 |
Kuhar
Description:
Lisa works as a waitress in a restaurant. Tonight is her
birthday so Lisa asked the chef to prepare his special meal for
her friends. The chef’s meal is made of $N$ ingredients. To prepare one
serving of the meal he needs a certain amount of each
ingredient.
There are some ingredien... | 28,529 |
Kutevi
Description:
One day Mirko was cleaning up his room and found a ruler and
a compass. He went to the school the next day and challenged
his friend Slavko to a geometric construction battle. Mirko
knows how to construct some angles using the ruler and compass
and knows how to subtract and add any ... | 28,530 |
Kveðja
Description:
Mirko is writing an email client, and he is almost done with
the program. However, he is missing a feature that
automatically writes signatures at the end of emails.
Mirko asks you for help to implement this feature.
## Input
The first line contains the name of the sender, which is a
... | 28,531 |
Kínahvísl
Description:
Bartosz and his friends are playing a whispering game at
their preschool.
The whispering games plays out with $N$ people sitting in a circle. Some
particular person (lets number them $1$) thinks of a word and whispers it
to the person on their left, person $2$. Person $2$ then whisp... | 28,532 |
LCM Pair Sum
Description:
One of your friends desperately needs your help. He is
working with a secret agency and doing some encoding stuff. As
the mission is confidential he does not tell you much about
that, he just wants you to help him with a special property of
a number. This property can be expre... | 28,533 |
LCM Thief
Description:
There are $n$ numbers
hidden in the vault of the intergalactic hall of numbers.
Visitors to the hall can see the least common multiple (LCM) of
these numbers as part of the exhibit. Recall that the LCM of
$n$ numbers $x_1,x_2,\dots ,x_ n$ is the smallest
positive integer whic... | 28,534 |
LCM Tree
Description:
You are given $n$ nodes
with positive integer values to be arranged into an LCM tree.
In how many ways (modulo $10^9 +
7$) can you do that? Two ways are considered different
if there are two nodes $x$
and $y$ so that
$x$ is a child of
$y$ in one way but not in
the ... | 28,535 |
Ladder
Description:
You are attempting to climb up the roof to fix some leaks,
and have to go buy a ladder. The ladder needs to reach to the
top of the wall, which is $h$ centimeters high, and in order to
be steady enough for you to climb it, the ladder can be at an
angle of at most $v$
degrees fro... | 28,536 |
Ladice
Description:
Mirko has $N$ items
(labeled with numbers from $1$ to $N$) and $L$ drawers (labeled with numbers from
$1$ to $L$). All items are currently
scattered throughout his room, so he decided to clean them up.
Each drawer can contain one item, and in order to make it
easier for Mirko to... | 28,537 |
Lafhræddir Læknar
Description:
As the new hospital grows ever closer to finishing
construction the doctors get ever bolder. They have been
spotted past Gamla Hringbraut and even in the wetlands near the
airport. This worries both the University of Iceland and
University of Reykjavík. Clearly these doct... | 28,538 |
Lamps
Description:
The use of incandescent light bulbs is soon being banned
within the European Union, but it can already be profitable to
use low energy lamps. Your task is to write a program that,
given for how long a light is on each day and the price of
electricity, computes after how many days the... | 28,539 |
Land Equality
Description:
There is a kingdom where the old King wants to divide his
land into two pieces and give them to his two descendants. The
King’s land is a grid of $r$ rows and $c$ columns. Each cell in the grid has
an integer value representing the prosperity of the cell, which
can be $0$ (de... | 28,540 |
Land Inheritance
Description:
Alob and Bice inherited from their parents a piece of land
represented by a simple polygon. There is a canal represented
by a straight line. Each brother inherited the lands on one
side of the canal. It is possible that the land of each person
consists of several disconnec... | 28,541 |
Landline Telephone Network
Description:
The mayor of RMRCity wants to create a secure landline
telephone network for emergency use in case of serious
disasters when the city is cut off from the outside world. Some
pairs of buildings in the city can be directly connected with a
wire telephone line and t... | 28,542 |
Landlocked
Description:
Canada is not a landlocked country: the country touches at
least one ocean (in fact, it touches three).
There are $46$
countries (including Bolivia and Mongolia, for example) which
are landlocked. That is, they do not touch an ocean, but by
going through one other country, an o... | 28,543 |
Landscape Generator
Description:
Interactive Creative Players Collective (ICPC) is working on
a new computer game for which they want to generate realistic
landscapes. One of the ICPC engineers proposed an algorithm
inspired by geological processes. The algorithm starts with a
flat landscape and repeat... | 28,544 |
Landscaping
Description:
Preparations for a good harvest in Spring start now and
farmer John is preparing his field for a good season. He went
over-budget last year, as the tractors moving up and down the
hills needed more fuel than he expected.
When harvesting, his tractors need to move both horizontally... | 28,545 |
Landsreisa
Description:
Stefán and Eva live in Vestmannaeyjar. Eva wants to see the
entire country. They intend to visit every location in the
country exactly once and then end up back in Vestmannaeyjar.
Stefán hates traveling and thus wants to spend the least amount
of time traveling between locations... | 28,546 |
Lane Switching
Description:
The Autonomous Car Manufacturer (ACM) needs to design
algorithms to control their cars. One particular problem is
lane switching—if the car needs to switch lanes, it wants to do
so in the safest manner.
Initially the car is in the leftmost lane, and the car needs
to switch ... | 28,547 |
Language Interpreter
Description:
When preparing for the CS3233 Final Team Contest, we (the
problem setters) realized that one of the problems can be
easily solved by using our custom programming language. Right
after that realization, we decided to simply replace that
problem with this one — write the... | 28,548 |
Language Survey
Description:
You have made a survey to find where in Gridnavia each
language is spoken. The following question was sent to every
cell in the region: “Please indicate if one or several of the
languages is spoken in your cell”. But due to a misprint, there
were no choices after the questi... | 28,549 |
Laptop Sticker
Description:
Your school has provided you with a laptop computer!
However, they insist on putting a laptop sticker with their
logo on your new computer. That sticker might be very large,
and it can’t be rotated! Will it fit, with one centimeter to
spare on all sides?
## Input
The singl... | 28,550 |
Laptop Stickers
Description:
One of Atrebla’s favourite pastimes is collecting stickers
from all the conferences he attends. Due to a series of
unfortunate events, all of the usual ones have been cancelled,
so this year he has finally decided to start putting them onto
his laptop.
Atrebla has laid out... | 28,551 |
Large Differences
Description:
Tom has $N$ objects of
various heights, where object $i$ has height $H_ i$. He wants to line them up in a
row and take a photo of them. Since he likes chaos, he wants
the photo to look as disorderly as possible. In particular,
given an arrangement, he will calculate the m... | 28,552 |
Large Party
Description:
Irena and Sirup are organizing their engagement party next
weekend. They want to invite almost everyone they know. They
also bought a very big round table for this occasion. They are
now wondering how they should distribute people around the
table. Irena claimed that when there... | 28,553 |
Largest Factor
Description:
You are given a positive integer $n$ and are to find its largest prime
factor.
## Input
The first and only line of input contains a positive integer
$2 \leq n \leq 10^9$.
## Output
Print the largest prime factor of $n$.
**Sample Input 1**
**Sample Output 1**
```
52736890
```
... | 28,554 |
Largest Hoarding
Description:
The real estate market in Metropolis is flourishing, and the
main street in downtown Metropolis is now lined with a
continuous row of high-rise buildings (skyscrapers). Not
surprisingly, advertisers have been eager to put up large
hoardings on the walls of these buildings.... | 28,555 |
Largest Pocket
Description:
Consider a grid of $1 \times
1$ squares, and suppose $N$ columns, each consisting of zero
or more $1 \times 1$
grid-aligned blocks, are arranged in a row, all with the same
baseline. A pocket is defined as an empty
two-dimensional space located above the baseline and bou... | 28,556 |
Largest Triangle
Description:
Given $N$ points on a
$2$-dimensional space,
determine the area of the largest triangle that can be formed
using $3$ of those
$N$ points. If there is no
triangle that can be formed, the answer is $0$.
## Input
The first line contains an integer $N$ ($3
\le N \le ... | 28,557 |
Lasers
Description:
Consider a grid of $n$
columns and $m$ rows.
Number the columns from $0$ to $n-1$ from left to right.
Within the grid, some double-sided mirrors of the form
“\” or “/”
are placed.
Assume the grid wraps around, that is, the left edge is
connected to the right edge.
When a lase... | 28,558 |
Last Factorial Digit
Description:
The factorial of $N$,
written as $N!$, is
defined as the product of all the integers from $1$ to $N$. For example, $3! = 1 \times 2 \times 3 = 6$.
This number can be very large, so instead of computing the
entire product, just compute the last digit of $N!$ (when $N!$ is ... | 28,559 |
Last Guess
Description:
If you spent any amount of time on social media at the end
of last year, you are probably familiar with the word finding
game Wordle, in which you need to find a five-letter
English word using at most six guesses. After each guess, the
letters in that guess are marked in either ... | 28,560 |
Last Minute
Description:
Oh no! Chalmers Challenge is only one day away and Chalmers Coding Club haven’t had the time
to prepare all tasks. As we all know, competitive programming
problems are created by combining funny problem statements with
computer programming methods. There are $A_{uniq}+A_{reuse}$ pr... | 28,561 |
Lateral Damage
Description:
Unfortunately, your opponent appears to bend the rules to
their liking, and does not always determine the placement of
their ships before you start shooting. You are not impressed by
their attempt at cheating, and decide to try and win the game
anyway.
Your goal is to locat... | 28,562 |
Latin Square
Description:
A Latin Square is a $n \cdot
n$ array filled with $n$ integers from $1$ to $n$, such that each number appears
exactly once in each row and in each
column.
For example, below is a Latin Square:
$1$
$2$
$3$
$2$
$3$
$1$
$3$
$1$
$2$
Gon really likes Latin Squares. He is cur... | 28,563 |
Laundry
Description:
Fortunately, your washing machine is quite old and only
supports three different washing programmes: A, B, and C. You
can put at most $k$ items
in one load, and each load can be washed using one of the
programmes.
Some items are easy to care for, and you can put them in any
lo... | 28,564 |
Lava
Description:
While walking in grand malls little Elsa likes to play a
game she calls “Lava”. This is a simple game using the
different colors of the floor tiles as markers for where it is
safe to walk and where it is not. The rules of the game say
that you’re allowed to walk on white tiles, but no... | 28,565 |
Lawn Mower
Description:
The International Collegiate Soccer1
Competition (ICSC) is famous for its well-kept rectangular
stadiums. The grass playing fields in ICSC stadiums are always
100 meters long, and 75 meters wide. The grass is mowed every
week with special lawn mowers, always using the same strat... | 28,566 |
Lazy Learner
Description:
Lang is very lazy at learning English. He is always getting
distracted during English classes. Being happy with the sweet
message he got from his girlfriend yesterday, Lang invented a
game to play during his English class.
Lang has an English dictionary containing $n$ words, deno... | 28,567 |
Lazy Students
Description:
As a third-year student at Hogwarts School of Witchcraft and
Wizardry, Harry must study arithmetic (known as Arithmancy in
the wizard world).
Today’s Arithmancy lesson revolves around addition. For
homework, Harry is given four positive integers $n$, $x$, $y$, and $z$. Harry nee... | 28,568 |
Leaderboard Effect
Description:
You are in charge of a programming contest with a number of
distinct problems and an overall time limit. The judges provide
for each problem a reading time, a coding time, and a solution
probability.
During the contest, teams can view a leaderboard that shows
the accept... | 28,569 |
Leapfrog
Description:
These frogs are experts in forming towers by climbing on top
of each other. They are, however, not experts in gathering
orderly on the road, so the frogs have arrived on different
positions along the central road. The frogs are also notorious
show offs: their every jump is as far ... | 28,570 |
Leapfrog Encryption
Description:
We’ve come up with a new encryption method we call Leapfrog
Encryption. It is a key-based encryption scheme where an
alphabetic key specifies how letters in the plaintext (the text to be encrypted) are placed
in the ciphertext (the resulting
encrypted string). Here’s ho... | 28,571 |
Learning to code
Description:
In the 21st century, Hunters are expected to master
programming languages, in order to effectively gather
information on the Internet.
Gon is currently learning NenScript — the most popular
programming language amongst Hunters.
Today, Gon is learning variables. In NenScript,... | 28,572 |
Left Beehind
Description:
If Bill has more jars of sour honey than sweet, he will be
left “beehind”. If Bill has more jars of sweet honey than sour
he will go to the convention. If Bill has the same number of
sweet and sour jars, his friends are undecided. Lastly, Bill’s
friends are superstitious, if h... | 28,573 |
Left and Right
Description:
With modern technology advancement, it is now possible to
deliver mail with a robot! There is a neighborhood on a long
horizontal road, on which there are $n$ houses numbered $1$ to $n$ from left to right. Every day a
mail delivery robot receives a pile of letters with exactly o... | 28,574 |
Lefties vs. Righties
Description:
Election season has begun! The news network you work for
wants to present expert opinions on a variety of important
topics. To give the appearance of being unbiased, the news
chief insists the experts that are interviewed cover a broad
range of the political spectrum.
... | 28,575 |
Leggja saman
Description:
Arnar tells Hannes how many cars he parked and Hannes tells
Arnar how many cars he parked. Now they want to know how many
cars they parked in total and ask for your help.
## Input
The input is on two lines. The first line contains a single
integer $n$ ($2 \leq n \leq 1000$), the... | 28,576 |
Lego Lover's Triangle
Description:
A Lego fan wishes to build a triangular wall with 2x4 lego
blocks. The bricks are to be laid in an overlapping fashion so
that each brick is connected to half (a 2x2 portion) of each of
the two bricks above it. She knows the dimensions she wants for
the wall, however ... | 28,577 |
Leiðangur
Description:
Little Óli is going off on a journey. On the way he will
enounter three types of things: money, gold and jewels. When he
encounters one of these things he can put it at the top in his
backpack, if he wants to. But Óli will also encounter bad guys
on the way. There are three kinds... | 28,578 |
Lektira
Description:
Mario is making up silly games again instead of reading
Dostoevsky for school. The rules of his newest game follow.
First he chooses a random word from the book. Then he splits
the word in two arbitrary places to get three separate words.
After that he reverses the order of the let... | 28,579 |
Lemonade
Description:
Simon just wanted to make cute robot dogs to keep as pets,
but they turned against him. They have currently taken over his
garden — where they are preparing for world domination. The
robot dogs are (obviously) fueled by lemonade, and they have
built a small lemonade factory using ... | 28,580 |
Lemonade Trade
Description:
The lunch break just started! Your mother gave you one litre
of pink lemonade. You do not like pink lemonade and want blue
lemonade instead. Fortunately for you the other children in
class are willing to trade with you.
Each of them is willing to offer you any quantity of the
... | 28,581 |
Less vs. Fewer
Description:
Grammarians of the worlds, unite! There is a blight
on the English language in the form of commonly used phrases
like “less days” (horrors!), which should actually be “fewer
days” (music to the ears), or “amount of people” (gasp!), which
should be “number of people” (all is ... | 28,582 |
Let's Meet
Description:
MTR (subway) stations are common meetup locations in Hong
Kong. Alice and Bob are going to meet up at one of the MTR
stations. They each show up at the meeting spot in one of the
stations right at noon, without remembering which station they
plan to meet at. Having poor cellphon... | 28,583 |
Let's Play Monopoly!
Description:
Monopoly is a fast-dealing property trading game, which is
firstly designed by Elizabeth Magie and then published as well
as owned by Hasbro. Since its first appearance in 1935, this
game has quickly become well-known and deserves the best way of
enjoying with friends ... | 28,584 |
Letter Balloons
Description:
You are organizing a programming contest, and have decided
that the first team to solve each problem will get a balloon in
the shape of the problem’s letter. For example, suppose there
are twenty-three problems in the contest, labeled A through W.
The team members for Wossa... | 28,585 |
Letter Optimization
Description:
The programming olympiad committee, composed of $N$ people, is going to send out
envelopes with posters for the qualifier competition to all
schools. To make the process faster, they have split up the
tasks that need to be done. The tasks include writing
addresses, putt... | 28,586 |
Letter Wheels
Description:
You would like to determine whether it is possible to rotate
the wheels so that every column has three distinct letters
across the three wheels, and if so, determine the minimum
number of rotations required.
## Input
The input has exactly three lines. Each line has a string
... | 28,587 |
Lexicographical Lecturing
Description:
The OUG (“Ordered University of Germany") is a renowned
German university. Since it has a lot of students, student IDs
are quite long strings of equal length $\ell $, where each student ID only
contains lowercase letters of the English alphabet.
Unfortunately fo... | 28,588 |
Lexicography
Description:
An anagram of a string is any string that can be formed
using the same letters as the original. (We consider the
original string an anagram of itself as well.) For example, the
string ACM has the following 6 anagrams, as given in
alphabetical order:
```
ACM
AMC
CAM
CMA
MAC
MC... | 28,589 |
Ley Lines
Description:
In 1921, the amateur archaeologist Alfred Watkins coined the
term “ley lines” to refer to straight lines between numerous
places of geographical and historical interest. These lines
have often been associated with mysterious and mystical
theories, many of which still persist.
On... | 28,590 |
Leynitölur
Description:
Jón has a list of his 100 favourite numbers, all integers in
the interval from $0$ to
$10^{18}$. He cares deeply
about these numbers and doesn’t want anyone finding out about
them. He has decided to encrypt the numbers, doing it in the
following way:
* He takes a value $x$ ... | 28,591 |
Leyniþjónusta
Description:
In a recent data leak, some of the things the CIA has been
examining were revealed. One of the items that came to light
was that they had a tool, which could find email addresses that
have been obscured by adding spaces, in order to avoid spam.
The Icelandic Intelligence Agen... | 28,592 |
License Renewal
Description:
Rookie Bunny is helping the motor vehicle department to
renew licenses for its customers. She works at the ticket
machine and gives tickets to customers to tell them at which
counters they will be served. There are two counters providing
service in the office today. The two... | 28,593 |
License to Launch
Description:
Birk has made a new shiny rocket and just received his
licence from the Bluesky Global Order (BGO) to launch anytime
within the next $n$ days.
He is, however, worried that the rocket will hit space junk on
its way. In order minimize the risk of a collision, Birk has
m... | 28,594 |
Life Forms
Description:
You may have wondered why most extraterrestrial life forms
resemble humans, differing by superficial traits such as
height, colour, wrinkles, ears, eyebrows and the like. A few
bear no human resemblance; these typically have geometric or
amorphous shapes like cubes, oil slicks o... | 28,595 |
Lifeguards
Description:
Lifeguards have a very important job. They prevent people
from drowning and allow millions of people every year to
experience the joys of water. You are one of these lifeguards,
and you take your job very seriously. If regulations were up to
you, everyone would have to wear life... | 28,596 |
Lifting Walls
Description:
The local building firm needs your help. They are building
an apartment building where the walls are prefabricated and
lifted in place using cranes. The building firm has located
$n$ possible locations for
cranes, and needs to choose some of these so that the center of
ea... | 28,597 |
Liftkarta
Description:
The mountain Bergurbulgur consists of $N$ points and $M$ ski slopes where all slopes have a
certain difficulty rating $S_i$. For every slope there exists a
T-bar ski lift going up the slope. Since T-bar lifts can be
very irritating, their difficulty is the same as the ski slope
t... | 28,598 |
Liga
Description:
While the players are resting between sets, the station puts
on tedious commercials. Zvonko fires up the teletext feature on
his TV set and is reviewing the latest scores and standings in
the football league. Always sharp, he has come up with a new
mathematical game.
The standings ta... | 28,599 |
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